Emergency vehicle proximity warning signal



FIG. 1 is a perspective view of an emergency vehicle proximity warning signal showing my new design, with the wire broken in the center to indicate indeterminate length;

FIG. 2 is a front elevational view thereof, with the wire and signal pick-up element shown in an alternate position;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is a side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for an emergency vehicle proximity warning signal, as shown and described. 